BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 9, Problem 2A
The ion Ca2+ can act as a second messenger because it is
a. produced by the enzyme calcium synthase.
b. normally at a high level in the cytoplasm.
c. normally at a low level in the cytoplasm.
d. stored in the cytoplasm.
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Students have asked these similar questions
The Na/K pump in epithelium cells that line the gut is an example of ______ transport and helps __
Select one:
a.
active, prevent the movement of Cl- outside the cell
b.
active, prevent the movement of Cl- inside the cell
c.
active, prevent the movement of Na+ outside the cell
d.
passive, prevent the movement of Cl- outside the cell
e.
passive, prevent the movement of Cl- inside the cell
Which of the following statements about "leak channels" in the plasma mem-
brane is correct?
A. Proteins that form these channels bind to solutes to allow them to pass into
the cell.
B. They are passageways formed by proteins to allow water and ions to move
passively through the membrane.
C. They allow small ions and molecules to move between adjacent cells.
D. They are formed by glycoprotein and proteoglycans to allow hormones to
enter cells.
Which of these statements about ion movement through the plasmamembrane is true?a. Movement of Na+ out of the cell requires energy (ATP).b. When Ca2+binds to proteins in ion channels, the diffusion of Na+into the cell is inhibited.c. Specific ion channels regulate the diffusion of Na+ through theplasma membrane.d. All of these are true
Chapter 9 Solutions
BIOLOGY
Ch. 9.1 - Prob. 1LOCh. 9.1 - Prob. 2LOCh. 9.2 - Prob. 1LOCh. 9.3 - Prob. 1LOCh. 9.3 - Prob. 2LOCh. 9.4 - Prob. 1LOCh. 9.4 - Describe how information crosses the membrane in...Ch. 9.4 - Prob. 3LOCh. 9.4 - Prob. 4LOCh. 9.5 - Prob. 1LO
Ch. 9.5 - Prob. 2LOCh. 9 - Paracrine signaling is characterized by ligands...Ch. 9 - Signal transduction pathways a. are necessary for...Ch. 9 - The function of a ____is to add phosphates to...Ch. 9 - Which of the following receptor types is NOT a...Ch. 9 - How does the function of an intracellular receptor...Ch. 9 - Signaling through receptor tyrosine kinases often...Ch. 9 - Prob. 7UCh. 9 - Which of the following best describes the...Ch. 9 - Prob. 1ACh. 9 - The ion Ca2+ can act as a second messenger because...Ch. 9 - Different receptors can have the same effect on a...Ch. 9 - In comparing small G proteins like Ras and GPCR...Ch. 9 - Prob. 5ACh. 9 - The receptors for steroid hormones and peptide...Ch. 9 - Describe the common features found in all examples...Ch. 9 - The sheet of cells that form the gut epithelium...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Molecule X binds to a receptor that works as an ion channel. Which of the following must betrue of this receptor?A. It allows passage of only one type of ion.B. It is found in the cytosol of the cell.C. It is voltage dependent.D. It is slow to produce a response in the cell.arrow_forwardThe resting membrane potential of a cell is the consequence of which of the following concentrations of ions? A. High K* and Cl- outside the cell and high Na* and large anions inside the cell. B. High K* and Na* outside the cell and high Cl- and large anions inside the cell. C. High Cl- and Nat outside the cell and high K* and large cations inside the cell. D. High Ca2+ and Nat outside the cell and high K* and large cations inside the cell.arrow_forwardThe major function of the sodium-potassium pump is toa. pump Na+ into and K+ out of the cell.b. generate the resting membrane potential.c. maintain the concentration gradients of Na+ and K+ across theplasma membrane.d. oppose any tendency of the cell to undergo hyperpolarization.arrow_forward
- choose one: a. Steroids are hormones processed by their target cells at the plasma membrane b. Steroids are hormones which are able to be dissolved in water c. Steroids are made from cholesterol a type of fat d. Steroids do not use nuclear receptorsarrow_forwardThe energy source for movements of Na* and K* during an action potential is a. the Na*/K* ATPase b. the thermal energy in the cell membrane c. the concentration gradients for the ions d. determined by the lipids of the cell membrane e. the negative charge of the extracellular fluid relative to the cytosolarrow_forwardDynein uses ATP to A. propel axoneme arms together B. undergoes conformational changes that moves across microtubules in the minus end C. Moves across microtubules in a directional manner D. converts ATP to ADP to undergo head region changesarrow_forward
- Receptors located within the cell are mostly A. Protein B. Glucoprotein C. Glucose D. Chitin D. Nonearrow_forwardWhich of these statements about carrier-mediated facilitated diffusion is true? a. It uses cellular ATP. b. It is used for cellular uptake of blood glucose. c. It is a form of active transport. d. None of these are true.arrow_forwardCell membranes can maintain a difference in electrical charge between the inte- rior of the cell and the extracellular fluid. What is this charge difference called? A. excitability B. the membrane potential C. the action potential D. the sodium-potassium pumparrow_forward
- One of the following is TRUE? A. The transport of Na+ across cell membranes depends solely on concentration gradient B. The transport of sucrose across cell membranes depends solely on concentration gradient C. The transport of K+ across cell membranes depends solely on concentration gradient D. The transport of Ca2+ across cell membranes depends solely on concentration gradient E. A & Carrow_forwardGlucose can be transported into cells with a glucose/sodium symporter. If the extracellular concentration of sodium is always in excess to that of glucose, which of these manipulations would MOST increase the rate of glucose transport into a cell? A. increase in the extracellular concentration of sodium B. increase in the intracellular concentration of sodium C. increase in the extracellular concentration of glucose D. increase in the intracellular concentration of glucosearrow_forwardif a cell has a net positive charge inside and there is a net negative charge outside the cell, which of the following is correct (if the membrane is permeable to each substance and the concentration of each is the same inside and outside the cell)? a. negative ions will move into the cell b. positive ions will move into the cell c. neutral ions will move into the cell d. negative ions will move our of the cellarrow_forward
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